3.5x^3-2.3x^2+1.4x+15.6-1.2x^3+4.5x ^2-0.3x-3.2

Hello

Step-by-step explanation:

1) 11x^2y^2+7xy

2) 2.3x^3−2.3x^2+1.4x+15.6

3) −2x^2−2xy+5x+7y−4

4) 9x−13y−1

6) ax+bx−cx (stays the same)

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540